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Which plant condition is a result of inadequate nitrogen supply?

  1. Stunted growth

  2. Yellowing leaves

  3. Wilting

  4. Leaf drop

The correct answer is: Yellowing leaves

Yellowing leaves is a classic symptom of nitrogen deficiency in plants. Nitrogen is an essential macronutrient that plays a vital role in the formation of chlorophyll, the green pigment responsible for photosynthesis. When a plant does not receive enough nitrogen, it struggles to produce sufficient chlorophyll, leading to a yellowing effect in the older leaves first, as the plant reallocates nitrogen to newer growth. The yellowing indicates that the plant is unable to carry out photosynthesis efficiently, which can stunt its growth and overall health. While other conditions like stunted growth, wilting, and leaf drop can be symptoms of various stressors or deficiencies, the distinct yellowing of leaves strongly correlates specifically with inadequate nitrogen supply.